Absr~r: Reactions of molybdenum stabilk& propm-gyl catious 2 w&h m 8cc described, constW@ a molybdenum mediated analogue of the Nicholas reaction snd extending the scope of pcoprgylations of enam%s by means of mu&ion metal compkxed carboc&ons. Ohmclear traasition metal alkyne complexes have received an iocresaing deal of Wenzst from synthetic organic *mists ~~thepasttwodecadesaadthwshavebecomeversatileaadpo~~LgencrforOrgancs~.~y in&zest@ in this context are transition metal stabilixed pmpargyl cations. The ~(CO>,auryae complexes 1 are the most thoroughly investigated class of compounds in this field. Reactions with nuckopbiles, commonly termed Nkholus reacrions, have been extensively studied For the most part carbon nu&@iles were WXXI,*~ hut Nicholas reactions with 0-,N-and S-nucleophiles are also knowt~~ Recently research also has fwused on the [CpMo(CO&aaalogues 2 and the uuresqonding mixed metal compounds, CpMo(CO&o(CO),-alkyne complexes 3. A few reactions of molyhdermm stabilized propargyl cations 2 with nucleophiles wefe repor@,'" but no use has been made so far of these compounds for organic syntheses.